[" B-2."If(cos theta+1sin theta)(cos2 th...

[" B-2."If(cos theta+1sin theta)(cos2 theta+1sin2 theta)-(cos n theta+i sin n theta)=1," then the value of "0" is "],[[" (A) "(3mn)/(n(n+1))+m=2," (B) "(2m pi)/(n(n+1)),m2," (C) "(4m pi)/(n(n+1))m=2," (D) "(m pi)/(n(n+1))*m=2]]

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